YAML showcase

showcase.yaml

###
### YAML Showcase
###   Thanks for http://jp.rubyist.net/magazine/?0009-YAML
### To run:
###   cat $0 | ruby -r pp -r yaml -e 'pp YAML.load STDIN.read'
###
collection:
  mapping(block-style):
    name: Taro
    age:  32
  mapping(flow-style): {name: Jiro, age: 28}
  mapping(nest): {name: {first: Taro, last: Yamada}, age: 32}
  sequence(block-style):
    - 1
    - 2
    - 3
  sequence(flow-style): [1, 2, 3]
  sequence(nest):
    - [1, 2]
    - [3, 4]
    -
      - 5
      - 6
scalar:
  decimal:
           - 123            #
           - 1,234,567,890  #
           - 0644           # oct
           - 0xFF           # hex
           - 0.05           # Maybe, no exponetial notation

  boolean:   [true, yes, on, false, no, off]

  "null":    [~, null] 

  date:      2005-01-01

  timestamp: 2005-01-01 00:00:00 +09:00

  string:    ['true', "2005", hello world]

text(keep line-break): |
  aaa
  bbb
  ccc

text(keep line-break with the last): |+
  aaa
  bbb
  ccc

text(keep line-break without the last): |-
  aaa
  bbb
  ccc

text(replace line-break to space except for the last): >
  aaa
  bbb
  ccc

text(replace line-break to space keeping the last): >+
  aaa
  bbb
  ccc

with indent width: |4  # Remove 4 spaces from begin of each line
     foo
    bar
     baz
    bee

anchor and alias (like the pointer notation of C):
  simple:
    - &mark 'Hello World'    # To put an anchor
    - *mark
    - *mark
  complex:
    posts:
      - &ceo {id: 91, name: CEO}
      - &cfo {id: 92, name: CFO}
      - &cto {id: 93, name: CTO}
    employees:
      - {name: Suzuki, post: *ceo}
      - {name: Ohta,   post: *cfo}
      - {name: null,   post: *cto}
...
After 3 dots, all is ignored like __END__ of perl.